Feature: 1. Automatic Drainage: Used with a micropump to form an unattended drainage system with switches that provide reliable pump operation from a fully sealed bilge. 2. Wide Application: With ultrasonic welding, which has has good sealing and can be used for automatic operation of 12V, 24V or even 32V bilge pumps or alarms. 3. Operation: When the water level is higher than 1.77‑1.97in, the pump will automatically turn on, and when the water level drops to 0.79‑0.98in, the pump will automatically turn off. 4. Installation: The switch is installed in the bilge with the bilge pump (not included), for better performance, it should be installed horizontally with a maximum angle of 30 degree. 5. Durable Material: Constructed with heavy duty ABS material, simple appearance, easy installation, internal metal contacts, to ensure reliable start and stop, easy installation. Specification: Item Type: Boat Float SwitchMaterial: ABS, metalWorking Voltage: 12V/24V/32V Maximum Current: 25A Wire Gauge: 14AWGNote: When the switch panel is in the manual option, start the pump manually. When you release your hand from the switch panel, the switch panel turns. .Connection: 1. Connect the brown wire of the float switch to the positive pole of the pump (brown wire), and then connect the wire to the manual option of the switch panel. 2. Connect the other brown wire of the float switch with the automatic option of the switch panel. 3. Connect the negative pole (black wire) of the pump to the negative pole of the battery. Package List: 1 x Boat Float Switch1 x Manual2 x Screw